Ṣāḥib ibn ʿAbbād states in his treatise: Abū Ḥammād al-Rāzī said: “I entered upon His Holiness al-Hādī (upon him be peace) and asked him about certain matters. When I intended to depart from his sacred presence, he said: ‘Whenever difficulties arise for you, ask them of ʿAbd al-ʿAẓīm al-Ḥasanī, and convey my salām to him.’”
In the *Amālī* of al-Ṣadūq, within the ḥadīth of “Presenting One’s Religion” (*ʿarḍ al-dīn*), it is related that when His Holiness ʿAbd al-ʿAẓīm entered upon Imām al-Hādī (upon him be peace) and declared his beliefs, the Imām said: “You are truly one of our friends.”
Abū Naṣr al-Bukhārī, in his account of the descendants of Imām al-Mujtabā (upon him be peace), narrates from Abū ʿAlī Muḥammad ibn Hammām, from His Holiness Imām Ḥasan al-ʿAskarī (upon him be peace), that in the presence of that noble one, mention was made of ʿAbd al-ʿAẓīm al-Ḥasanī. He said: “Were it not for ʿAbd al-ʿAẓīm, we would say that ʿAlī ibn al-Ḥasan ibn Zayd ibn al-Ḥasan left no progeny.”
Ibn Qūlawayh in *Kāmil al-Ziyārāt* (ch. 107, p. 324) narrates from ʿAlī ibn al-Ḥusayn ibn Mūsā ibn Bābawayh, from Muḥammad ibn Yaḥyā al-ʿAṭṭār al-Qummī, that one of the people of Rey said: “I entered upon Abū al-Ḥasan al-ʿAskarī (Imām al-Hādī, upon him be peace). That noble one asked me: ‘Where have you been?’
I replied: ‘I have been to the ziyārah of Sayyid al-Shuhadāʾ (upon him be peace).’
His Holiness said: ‘Know and be aware: had you visited the grave of ʿAbd al-ʿAẓīm al-Ḥasanī (upon him be peace), which is among you, it would be as if you had visited Ḥusayn ibn ʿAlī in Karbalā.’”